Hydrothermal synthesis, structures and properties of metal phosphonates based on m-xylylenediphosphonic acid  

作　　者：Yu Yang Wei Xu Yuanxin Li Meng Liu Yiheng Zhang Lei Wang 

机构地区：[1]Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology

出　　处：《Chinese Science Bulletin》2014年第34期4720-4727,共8页

基　　金：supported by the National Natural Science Foundation of China(51372125,21176128 and 21203106);the Natural Science Foundation of Shandong Province,China(BS2010CL019,ZR2011BL015)

摘　　要：In this work, a series of new metal phosphonates were hydrothermally synthesized and structurally characterized based on m-xylylenediphosphonic acids(H4L), including[M(H2L)(bpy)](M = Mn 1, Co 2), [MH2L)(phen)](M = Co3, Cu 4), and [Cu2(H2L)2(bpy00)2] 5(bpy = 2,20-bipyridine,phen = 1,10-phenanthroline, bpy00= 4,40-dimethyl-2,20-bipyridine). X-ray diffraction indicated that compounds 1 and2 were isomorphic. Complexes 3 and 4 were shown to crystallize in different space groups but had similar crystallographic units. In the complexes, H4 L was seen to partially deprotonate to afford H2L2-. The H2L2-ligands in 1–4functioned as tetradentate ligands with each phosphonate group adopting bidentate coordination mode with two M centers to generate a 2D layer. In addition, the H2L2-anions in5 functioned as tridentate ligands with one phosphonate group adopting the bidentate mode and another phosphonate group adopti ng the monodentate mode, thus linking three Cu atoms to provide a 1D chain. The IR and thermal stabilities of these compounds were subsequently examined.In this work, a series of new metal phosphonates were hydrothermally synthesized and structurally characterized based on m-xylylenediphosphonic acids （H4L）, including [M（H2L）（bpy）] （M = Mn 1, Co 2）, [MH2L）（phen）] （M = Co 3, Cu 4）, and [Cu2（H2L）2（bpy＂）2] 5 （bpy = 2,2＇-bipyfidine, phen = 1,10-phenanthroline, bpy＂ = 4,4＇-dimethyl-2,2＇- bipyridine）. X-ray diffraction indicated that compounds 1 and 2 were isomorphic. Complexes 3 and 4 were shown to crystallize in different space groups but had similar crystallographic units. In the complexes, H4L was seen to partially deprotonate to afford H2L^2-. The H2L^2- ligands in 1-4 functioned as tetradentate ligands with each phosphonate group adopting bidentate coordination mode with two M centers to generate a 2D layer. In addition, the H2L^2- anions in 5 functioned as tfidentate ligands with one phosphonate group adopting the bidentate mode and another phosphonate group adopting the monodentate mode, thus linking three Cu atoms to provide a 1D chain. The IR and thermal stabilities of these compounds were subsequently examined.

关 键 词：水热合成 结构表征 膦酸盐 金属 特性 联吡啶 H2L 双齿配位 

分 类 号：O641.4[理学—物理化学]